The DSCAML1 Knockout HAP1 Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the human DSCAML1 gene. This heterogeneous pool of gene-edited cells provides a robust loss-of-function model for investigating the biological roles of the Down syndrome cell adhesion molecule like 1 (DSCAML1) in a near-haploid genetic background. The polyclonal format captures diverse editing events across the target locus, enabling functional studies without the need for single-cell cloning. These cells are suitable for a broad range of cell-based assays aimed at dissecting DSCAML1-mediated adhesion and signaling processes.
The parental HAP1 cell line is a near-haploid human cell line derived from a male patient with chronic myeloid leukemia. With a fibroblast-like adherent morphology and a largely haploid karyotype (except for a disomic region on chromosome 15), HAP1 cells are extensively employed in genome-wide CRISPR screens due to the ease of generating homozygous knockouts. The line retains the BCR-ABL1 fusion gene characteristic of its leukemic origin but exhibits a stable, non-tumorigenic phenotype in vitro. This unique genetic simplicity makes HAP1 an ideal host for studying gene function with minimal interference from redundant alleles.
DSCAML1 encodes a homophilic cell adhesion molecule that mediates neuronal cell?Ccell interactions and axon guidance through direct extracellular domain interactions. Upon trans-homophilic binding, DSCAML1 recruits the guanine nucleotide exchange factor DOCK, which in turn activates the p21-activated kinase PAK1. PAK1 then stimulates RAC1-dependent actin cytoskeleton remodeling, driving neurite outgrowth and cell adhesion dynamics. The signaling cascade is regulated upstream by neural transcription factors such as NEUROG2 and PAX6, which control DSCAML1 expression during neurogenesis. Additionally, DSCAML1 interacts with scaffold proteins like SHANK, linking adhesion to postsynaptic organization. These molecular connections place DSCAML1 at the intersection of cell adhesion signaling, axon guidance, and actin remodeling pathways.
In the HAP1 near-haploid system, disruption of DSCAML1 provides an effective loss-of-function model for functional interrogation. This knockout pool is particularly valuable for studying adhesion-dependent phenotypes and signaling events that are often masked by compensatory mechanisms in diploid cells. Researchers can directly assess the impact on PAK1/RAC1 signaling, neurite-like extension, and homophilic binding without the confounding effects of a second wild-type allele. The HAP1 background also facilitates high-throughput screening for genetic interactions and drug targets related to DSCAML1-associated pathologies, including neurodevelopmental disorders and cancers such as glioblastoma.
These polyclonal knockout cells are suitable for diverse experimental workflows. Typical assays include Western blotting, RT-qPCR, immunofluorescence for neurite outgrowth, cell adhesion assays, and wound healing migration. Co-immunoprecipitation reveals protein interactions, while phospho-signaling analysis monitors PAK1 activation. Flow cytometry quantifies surface DSCAML1, and RNA-seq or CRISPR essentiality screens enable global functional studies. For further details or ordering information, please contact Ascent Research.
